Well in this case the reputation for “warm beer” is true and I’m willing to die on this particular hill.
Proper cask ale should be served at between 8 and 12C, AKA cellar temperature, cool but not cold. Nothing beats a traditional pint of ‘best bitter’ in an old pub!
Plenty of people in the UK drink lager and other styles of beer that are more highly carbonated, stronger ABV, and served colder. Personally I’m not a fan but each to their own.
I live about an hour from London in a rural area with loads of great pubs but I find it difficult to find a nice beer in most parts of London. It’s much easier to keep a keg of carbonated beer under pressure than a cask ale that you have to finish within a few days of tapping, which is why when a certain proportion of a pub’s clientele start drinking other styles it just isn’t worth it for the pub to keep real ale. Hopefully it won’t become a niche thing.